EP1755504B1 - Enveloppe de pied fonctionnelle - Google Patents

Enveloppe de pied fonctionnelle Download PDF

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Publication number
EP1755504B1
EP1755504B1 EP05753573.4A EP05753573A EP1755504B1 EP 1755504 B1 EP1755504 B1 EP 1755504B1 EP 05753573 A EP05753573 A EP 05753573A EP 1755504 B1 EP1755504 B1 EP 1755504B1
Authority
EP
European Patent Office
Prior art keywords
section
stiffness
cover
foot cover
foot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05753573.4A
Other languages
German (de)
English (en)
Other versions
EP1755504A2 (fr
Inventor
Arinbjorn Viggo Clausen
Erla Sigridur Gestsdottir
Christophe Lecomte
Heidrun Gigja Ragnarsdottir
Hjordis Thornhallsdottir
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OESSUR HF
Original Assignee
Ossur hf
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Filing date
Publication date
Application filed by Ossur hf filed Critical Ossur hf
Publication of EP1755504A2 publication Critical patent/EP1755504A2/fr
Application granted granted Critical
Publication of EP1755504B1 publication Critical patent/EP1755504B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/66—Feet; Ankle joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/66—Feet; Ankle joints
    • A61F2/6607—Ankle joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/3006—Properties of materials and coating materials
    • A61F2002/30069—Properties of materials and coating materials elastomeric
    • A61F2002/3007—Coating or prosthesis-covering structure made of elastic material, e.g. of elastomer
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
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    • A61F2002/5009—Prostheses not implantable in the body having elastic means different from springs, e.g. including an elastomeric insert having two or more elastomeric blocks
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2002/5016—Prostheses not implantable in the body adjustable
    • A61F2002/503—Prostheses not implantable in the body adjustable for adjusting elasticity, flexibility, spring rate or mechanical tension
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/5044—Designing or manufacturing processes
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0084—Means for distinguishing between left-sided and right-sided devices; Sets comprising both left-sided and right-sided prosthetic parts

Definitions

  • the present invention relates to foot covers and, in particular, to covers for a foot prosthesis.
  • Conventional prosthetic foot designs are sometimes enclosed in a cosmesis or cover to improve the aesthetic appeal of the prosthesis, as shown, for example, in U.S. Patent No. 4,865,612 to Arbogast et al.
  • Some conventional cosmesis designs have the shape of a human foot and are made, for example, of rubber or other flexible materials, which provide additional cushion to the prosthesis during use.
  • conventional cosmeses are not designed to enhance the performance of the prosthesis based on the nature and impact-level of the expected use.
  • a cover for a foot prosthesis is provided.
  • An opening at a top end of the cover extends into a cavity formed within the cover, wherein the cavity is configured to receive a prosthesis therein.
  • a wall surrounds the cavity and has the shape of a natural human foot.
  • the wall has an inner surface and an outer surface.
  • the wall also has a top section, a bottom section and a rear section.
  • the bottom section defines a sole area having a toe section, a heel section, and a metatarsal region, wherein the sole area is provided with varying levels of stiffness configured to induce a desired rollover from heel-to-toe, a portion of the desired rollover being in a lateral-to-medial direction.
  • a cover for a foot prosthesis comprising an opening at a top end of the cover.
  • the opening extends into a cavity within the cover configured to receive a prosthesis therein.
  • a wall surrounds the cavity and has the shape of a natural human foot.
  • the wall has an inner surface and an outer surface.
  • the wall also has a top section, a bottom section and a rear section.
  • the bottom section defines a sole area having a toe section, a heel section, and a metatarsal region, wherein the sole area is provided with a plurality of selected regions of differing stiffness relative to areas surrounding said selected regions.
  • a cover for a foot prosthesis comprising an opening at a top end of the cover.
  • the opening extends into a cavity within the cover configured to receive a prosthesis therein.
  • a wall surrounds the cavity and has the shape of a natural human foot.
  • the wall has an inner surface and an outer surface.
  • the wall also has a top section, a bottom section and a rear section.
  • the bottom section defines a sole area having a toe section, a heel section, and a metatarsal region, wherein the sole area is provided with at least one selected region of reduced stiffness relative to an area surrounding said selected region.
  • a cover for a foot prosthesis having the shape of a natural human foot.
  • An opening at a top end of the cover extends into a cavity within the cover, the cavity configured to receive a prosthesis therein.
  • a top section extends between the opening and a toe section.
  • a rear section extends between the opening and a heel section.
  • a bottom section defines a sole area between the heel section and the toe section, the sole area having a metatarsal region extending between an inner edge and an outer edge of the bottom section.
  • a section of shock absorbing material is disposed on the sole area and has a first selected stiffness. The section of shock absorbing material is configured to provide a desired level of shock absorption.
  • a section of energy return material is disposed on the sole area and has a second selected stiffness.
  • the section of energy return material is configured to provide a desired level of energy return.
  • the sections of shock absorbing material and energy return material effect a desired rollover during a transition from heel-strike to toe-off to approximate the rollover of a human foot.
  • a cover for a foot prosthesis wherein the cover has the shape of a natural human foot.
  • the cover comprises a bottom section that defines a heel section, a toe section, and a metatarsal region therebetween.
  • a first material is disposed on the heel section and has a first selected stiffness.
  • a second material is disposed on the metatarsal section and has a second selected stiffness different from the first selected stiffness, wherein the first and second materials induce a rollover during a transition from heel-strike to toe-off, a portion of the desired rollover being in a lateral-to-medial direction.
  • Foot covers are known in the art and are described, for example, in pending U.S. Application Number 09/586,666, filed June 1 2000 .
  • FIGURE 1 illustrates one embodiment of a functional foot cover 100.
  • the functional foot cover 100 has the shape of a natural human foot, including a heel section 10 and a toe section 20.
  • the functional foot cover 100 can be made of polyurethane or a similar material.
  • the functional foot cover 100 can be made of other suitable materials, such as materials commonly used for the manufacture of prosthetic cosmeses.
  • FIGURE 2A illustrates a cross-section of another embodiment of a functional foot cover 200.
  • the functional foot cover 200 is preferably configured to receive a prosthesis therein, such as the prosthetic foot 50 illustrated in FIGURE 2B .
  • the prosthetic foot 50 is an ElationTM Foot by Ossur of Reykyavik, Iceland.
  • the use of any of the functional foot cover embodiments disclosed herein is contemplated with any prosthetic foot design.
  • the foot cover 200 has an opening 212 at a top end 210 thereof and a wall 214 having an inner surface 216 and an outer surface 218.
  • the inner surface 216 comprises a top section 216a, a bottom section 216b and a rear section 216c.
  • the outer surface 218 comprises a top section 218a, a bottom section 218b and a rear section 218c.
  • the opening 212 and inner surface 216 together define a cavity 220 within the functional foot cover 200.
  • at least one recess 230 is formed on the inner surface 216 of the wall 214.
  • a plurality of recesses 230 are shown, some of which are disposed on the bottom section 216b along a metatarsal region 240 proximal a toe section 250 of the foot cover 200.
  • Recesses 230 can also be disposed on the rear 216c and top 216a sections of the wall 214.
  • the recesses 230 can be formed on the outer surface 218 of the foot cover 200.
  • the recesses 230 are disposed on the foot cover 200 so as to facilitate flexion of the foot cover 200 during use. For example, when the foot cover 200 is placed on a prosthetic foot, the recesses 230 facilitate the flexion of the cover 200 during the prosthetic foot's walking motion, such as during toe-off.
  • the recesses 230 advantageously provide a functional foot cover 200 with improved rollover characteristics.
  • the recesses 230 comprise notches 230 formed on the inner surface 216 of the wall 214 of the functional foot cover 200, as illustrated in FIGURE 2 .
  • the notches 230 extend between about 1/4 and about 1/2 of a thickness 214a of the wall 214 of the foot cover 200.
  • the notches 230 can have other depths, such as less than about 1/4 of the thickness 214a of the wall 214, or more than about 1/2 of the thickness 214a of the wall 214, as desired.
  • FIGURE 3 illustrates a cross-sectional side view of another embodiment of a functional foot cover 300.
  • a shock absorbing material 330 is preferably disposed in the heel section 310 of the foot cover 300.
  • the shock absorbing material 330 can be inserts 332 disposed in cavities 334 formed on the inner surface 316 of the foot cover 300.
  • the shock absorbing material 330 can be embedded into the heel section 310.
  • the shock absorbing material 330 can be attached to the inner surface 316 of the foot cover 300 with, for example, an adhesive.
  • the shock absorbing material 330 can be removably attached to the inner surface 316 of the foot cover 300.
  • the shock absorbing material 330 can comprise inserts 332 that lockingly engage recesses or cavities (not shown) formed on the inner surface 316 of the foot cover 300. As shown in FIGURE 3 , the shock absorbing material 330 is disposed on at least a portion of the heel section 310. In a preferred embodiment, the shock absorbing material 330 covers an area between about 6 cm 2 and about 20 cm 2 of the heel section 310. In other embodiments, the shock absorbing material 330 can cover an area of less than about 6 cm 2 . In still other embodiments, the shock absorbing material 330 can cover an area of more than about 20 cm 2 .
  • the shock absorbing material 330 is preferably disposed on areas of the foot cover 300 that receive high impact forces during use.
  • the shock absorbing material 330 is EVA, or a similar material. However, other materials providing suitable shock absorbing characteristics can also be used.
  • an energy return material 350 is also disposed in the metatarsal area 340 proximal the toe section 320 of the foot cover 300.
  • the energy return material 350 can comprise inserts 352 disposed in cavities 354 formed on the inner surface 316 of the foot cover 300.
  • the energy return material 350 is embedded into the wall 314 of the foot cover 300.
  • the energy return material 350 can be attached to the inner surface 316 of the foot cover 300 with, for example, an adhesive.
  • the energy return material 350 is removably attached to the inner surface 316 of the foot cover 300.
  • the energy return material 350 covers at least a portion of the metatarsal region 340 of the foot cover 300.
  • the energy return material 350 can comprise inserts 352 that lockingly engage recesses or cavities 354 formed on the inner surface 316 of the foot cover 300.
  • the energy return material 350 covers an area of between about 6 cm 2 and about 20 cm 2 of the metatarsal region 340 of the foot cover 300. In other embodiments, the energy return material 350 can cover areas less than about 6 cm 2 . In still other embodiments, the energy return material 350 can cover an area of more than about 20 cm 2 .
  • the energy return material 350 is an elastic material, such as silicone. However, other materials that provide suitable energy return characteristics can also be used.
  • FIGURE 4 illustrates another embodiment of a functional foot cover 400.
  • the shock absorbing 430 and energy return 450 materials discussed above are attached to a bottom outside surface 418b of the foot cover 400.
  • the shock absorbing material 430 and energy return material 450 comprise inserts 432, 452 removably disposed in cavities 434, 454 formed on the bottom surface of the foot cover 400, respectively.
  • the shock absorbing 430 and energy return 450 materials can be attached to the foot cover 400 with an adhesive.
  • the inserts 432, 452 can have engagement members (not shown) that snap onto the recesses or cavities 434, 454.
  • the shock absorbing 430 and energy return 450 materials can be attached to the foot cover 400 using other known mechanisms, such as bolts and screws.
  • the shock absorbing 430 and energy return 450 materials can be molded onto the foot cover 400 during manufacture.
  • a set of shock absorbing inserts 432 having varying levels of shock absorption are provided. Accordingly the foot cover 400 can be tailored to provide the level of shock absorption best suited for a particular user's needs. Similarly, a set of energy return inserts 452 with varying levels of energy return can be provided to provide the level of energy return required by a specific user. Accordingly, the shock absorption 430 and energy return 450 materials can be tailored to the particular activity level of the user. For example, for a low-activity user, the shock absorption material 430 can be a highly elastic material, such as a highly elastic urethane or other polymer material. Similarly, for a high activity user, the shock absorption material 450 can be one with a lower elasticity.
  • FIGURE 5 illustrates another embodiment of a functional foot cover 500.
  • the foot cover 500 comprises materials of selected stiffness disposed along the sole area 505 of the foot cover 500.
  • said materials can have a durometer of between about 60 Shore A and about 95 Shore A.
  • the materials can have other levels of stiffness.
  • said materials are injection molded onto the foot cover 500 during manufacture.
  • the heel section 510 comprises a first material 530 of selected stiffness.
  • at least a portion of the metatarsal region 520 comprises a second material 532 of selected stiffness, which can have the same stiffness as the material in the heel section 510.
  • Still another section 525 of the sole 505 of the foot cover 500 comprises a third material 534 of selected stiffness, which may be different than that of the heel 510 or metatarsal sections 520. It will be obvious to one of ordinary skill in the art that various materials, each having a different stiffness, can be incorporated into the foot cover 500. Moreover, though the illustrated embodiment illustrates three different areas comprising materials of selected stiffness, it will be obvious to one of ordinary skill in the art that more or fewer areas of selected stiffness can be incorporated into the foot cover 500.
  • said materials 530, 532, 534 are disposed, and their stiffness selected, so as to guide the rollover of the foot cover 500 during use.
  • material having a higher stiffness can be disposed on the heel section 510 and be surrounded by material of lower stiffness.
  • the material disposed on the heel section 510 of the foot cover 500 can have a lower stiffness than the material surrounding said heel section 510.
  • the material disposed on the metatarsal region 520 can be disposed, and its stiffness selected, so as to guide the rollover of the foot cover 500.
  • the material disposed on the metatarsal region 520 has a higher stiffness than the material surrounding said region.
  • the material disposed on the metatarsal region 520 has a lower stiffness than the surrounding material.
  • the materials are disposed, and their stiffness selected, so that the functional foot cover 500 rolls over medially toward an inner edge 540 of the foot cover 500 during transition from heel-strike to toe-off and approximates the rollover of a natural human foot.
  • the coverage area of each material of selected stiffness is chosen to adequately guide the rollover of the foot cover 500, as described above.
  • the material disposed on the heel section 510 can have an area of between about 6 cm 2 and about 20 cm 2 .
  • the material of selected stiffness disposed on the metatarsal region 520 can have an area of between about 6 cm 2 and about 20 cm 2 .
  • the material of selected stiffness can be have an area less or greater than that disclosed above.
  • FIGURE 6 illustrates another embodiment of a functional foot cover 600.
  • the foot cover 600 includes a heel section insert 630 attached thereto and made of a material having a selected stiffness, which preferably differs from the stiffness of the surrounding area on the foot cover 600.
  • the foot cover 600 includes a toe section insert 640 attached thereto and made of a material having a selected stiffness, which preferably differs from the stiffness of the surrounding area.
  • Said materials preferably have a durometer of between about 60 Shore A and about 95 Shore A. In other embodiment, said materials can have other levels of stiffness. For example, the materials can have durometers lower or greater than the values noted above.
  • the heel and toe section inserts 630, 640 are removably attached to the foot cover 600.
  • the section inserts 630, 640 can be lockingly snapped onto cavities 632, 642 formed on the foot cover 600.
  • the toe and heel section inserts 630, 640 can be attached to the foot cover 600 with an adhesive.
  • the section inserts 630, 640 can be attached to the foot cover 600 using other fixation mechanisms, such as bolts and screws.
  • sets of inserts are provided, each having a different stiffness level.
  • the foot cover 600 can be tailored to have a particular rollover characteristic based on the stiffness level of the toe and heel section inserts 630, 640 that are attached to the toe section 620 and heel section 610, respectively, of the foot cover.
  • the inserts 630, 640 can be tailored to the particular activity level of the user.
  • FIGURE 7 illustrates another embodiment of a functional foot cover 700.
  • a sole portion 720 extending between a heel section 722 and a toe section 724, and defining a metatarsal region 726 therebetween, is provided for attachment to the foot cover 700.
  • the sole portion 720 has areas 725 of selected stiffness with a durometer preferably between about 60 Shore A and about 95 Shore A. In other embodiments, said areas 725 can have a durometer higher than about 95 Shore A. In still other embodiments, said areas 725 can have a durometer lower than about 60 Shore A.
  • the sole portion 720 has an opening 727a disposed generally at the heel section 722 and a second opening 727b disposed generally at the metatarsal region 726.
  • the openings 727a, 727b are preferably configured to fit over inserts of selected stiffness 732, 734 located generally at a heel section and metatarsal region of the foot cover 700, respectively.
  • the inserts 732, 734 have a stiffness level different than the stiffness of the surrounding area 725 on the sole portion 720.
  • the sole portion 720 can have any number of openings configured to accommodate an equal number of inserts of selected stiffness disposed in the foot cover 700. In another embodiment, the sole portion 720 does not have any openings.
  • the sole portion 720 is removably attached to the foot cover 700.
  • the sole portion 720 can have members (not shown) that protrude into recesses or cavities (not shown) formed on the bottom of the foot cover 700 so as to lockingly engage the sole portion 720 to the foot cover 700.
  • the sole portion 720 can be attached to the foot cover 700 with an adhesive.
  • the sole portion 700 can be manufactured using materials of different stiffness to guide the rollover of the foot cover 700 during use. In a preferred embodiment, said guided rollover is used to control pronation of the foot cover 700 during use.
  • the guided rollover approximates the walking motion of a natural human foot, so that the foot cover 700 rolls over medially toward the inner edge 740 of the foot cover 700 during transition from heel-strike and toe-off.
  • the guided rollover characteristics described above can be incorporated into the sole portion 720 of a cosmesis as described above, as well as an individual sole attached to a prosthetic foot, as described in U.S. Provisional Application No. 60/575,142, filed May 28, 2004 .
  • the foot cover 700 preferably comprises a metatarsal region 750 generally parallel to a supporting surface on which the foot cover 700 rests. Additionally, the toe section 760 of the foot cover 700 preferably comprises a set of toes 765 having an upper bend or tilt to provide a smoother toe push-off during use.
  • FIGURE 8A illustrates another embodiment of a functional foot cover 800 with a support member 820 disposed therein.
  • the support member 820 is a plate that is preferably embedded in the wall 824 of the foot cover 800.
  • the support member 820 is preferably made of a stiff material.
  • the support member 820 can be made of a carbon fiber material.
  • the support member 820 can be made of other suitable materials that provide the desired stiffness, such as a hard plastic.
  • the support member 820 improves the stability of the foot cover 800 along the metatarsal region 840.
  • the support member 820 extends along a portion of the metatarsal region 840.
  • the support member 820 attaches to the bottom of the foot cover 800 and extends transversely across substantially the entire width W of the foot cover 800 at the metatarsal region 840, as illustrated in FIGURE 8B .
  • the support member 820 can have other shapes, such as cylindrical. Additionally, the support member 820 can be disposed on other areas of the foot cover 800 requiring additional stability.
  • FIGURES 9A and 9B illustrate another embodiment of a functional foot cover 900.
  • the foot cover 900 includes a heel section 910 having a material of a selected stiffness 920.
  • said material of selected stiffness 920 is disposed on the heel section 910 of the foot cover 900 so as to improve the stability of the foot during heel strike.
  • the material of selected stiffness 920 is embedded into the heel section 910 so that the medial 912 and lateral 914 edges of the heel are stiffer than the middle portion 916 of the heel.
  • said material of selected stiffness 920 is injection molded into the heel section 910 during manufacture of the foot cover 900.
  • said materials of selected stiffness 920 can be removably attached to the heel section, via for example, snap-on inserts, as discussed above.
  • FIGURES 10A and 10B illustrate another embodiment of a functional foot cover 1000.
  • the foot cover 1000 comprises the shell 1100 configured to fit over a prosthetic foot or other prosthetic device.
  • the shell 1100 is sized to fit within conventional footwear, such as a shoe. More preferably, the shell 1100 is sized to substantially completely fill the inside of a shoe.
  • the shell 1100 comprises a top surface 1110 and a side surface 1120, but does not have a bottom surface.
  • the top portion 1210 of the foot cover 1200 proximal an opening 1220 includes a surface of increased area 1230 to facilitate the attachment of foam or other cosmetic filling to the functional foot cover 1200.
  • the surface of increased area 1230 includes several slots 1232 to facilitate attachment of the functional foot cover 1200 to foam or other cosmetic filling.
  • the number of slots 1232 on said foot cover 1200 can vary so as to be fewer or more than those depicted in FIGURE 11A .
  • FIGURE 11B illustrates another embodiment of a functional foot cover 1300 having a surface of increased area 1330 on a top portion 1320 of the foot cover 1300.
  • the surface of increased area 1330 defines a recess 1332 proximal a heel section 1310 of the foot cover 1300.
  • Said recess 1332 is preferably sized so as to facilitate attachment of the foot cover 1300 to foam or other cosmetic filling.
  • FIGURE 12 illustrates another embodiment of a functional foot cover 1400.
  • a height H of the foot cover 1400 is generally higher than conventional foot covers.
  • the height H of the foot cover 1400 can be between about 7 cm and about 10 cm. In other embodiments, the height H of the foot cover 1400 can be greater than about 10 cm.
  • a wall 1430 of the foot cover 1400 has a thickness T that tapers from a thicker section at the bottom 1410 of the foot cover 1400 toward a thinner section proximal an opening 1425 at a top end 1420 of the foot cover 1400.
  • the wall 1430 of the foot cover 1400 has a stepped thickness T, with a thicker section proximal the bottom 1410 of the foot cover 1400 and a thinner section proximal the top end 1420 of the foot cover 1400.
  • the thickness T of the wall 1430 at the opening 1425 of the foot cover 1400 is between about 1/4 and about 1/2 the thickness T of the wall 1425 proximal the bottom 1410 of the foot cover 1400.
  • the thickness T of the wall 1430 at the opening 1425 of the foot cover 1400 can be between about 1/8 and about 3/4 of the thickness T of the wall 1430 proximal the bottom 1410 of the foot cover 1400.
  • Said tapered thickness T advantageously facilitates the insertion of a prosthetic device within the foot cover 1400.
  • FIGURES 13A and 13B illustrate another embodiment of a functional foot cover 1500.
  • a sole 1510 of the foot cover 1500 includes areas of non-slip material 1530.
  • said areas of non-slip material 1530 increase the traction of the foot cover 1500 during slippery conditions, such as on a wet surface.
  • said areas of non-slip material 1530 include a pattern designed to increase traction of the foot cover 1500 during use.
  • the areas of non-slip material 1530 are molded to the sole 1510 of the foot cover 1530 during manufacture.
  • the areas of non-slip material 1530 can be applied to the bottom 1510 of the functional foot cover 1500.
  • the non-slip material 1530 can be sprayed onto the bottom 1510 of the foot cover 1500.
  • the non-slip material 1530 comprises silicone.
  • other materials having suitable non-slip characteristics can be used.
  • the non-slip material 1530 is applied to substantially the entire sole 1510 of the foot cover 1530.
  • the non-slip material 1530 is applied to selected localized areas on the sole 1510 of the foot cover 1500.
  • the functional foot cover can be manufactured to resemble a human foot, both male and female, and have five toes.
  • the foot cover can be used with a sandal.
  • the foot cover 500 can have a slot 550 between at least two of the toes 552, 554 formed on the foot cover 500, said slot 550 configured to receive a strap of a sandal.
  • the foot cover defines several toes disposed adjacent each other without any intervening slots therebetween.
  • any of the embodiments discussed above can be manufactured so as to closely resemble the person's foot.
  • a person's foot is scanned and a mold of said foot manufactured based on said scanning.
  • foot covers of varying sizes are manufactured using said foot scan.
  • construction of a foot cover using a mold based on a scanned foot provides a more accurate anatomical representation of a natural human foot.

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  • Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Claims (12)

  1. Enveloppe pour une prothèse de pied, comprenant une ouverture (212, 1220, 1320, 1425) au niveau de l'extrémité supérieure de l'enveloppe, s'étendant dans une cavité (220) à l'intérieur de l'enveloppe configurée pour recevoir la prothèse (50) dans celle-ci, et une paroi (214, 314, 824, 1430) entourant la cavité (220) et présentant la forme d'un pied humain naturel, la paroi comportant une surface intérieure et une surface extérieure, la paroi (214, 314, 824, 1430) définissant également une section supérieure (216a), une section inférieure (216b) et une section arrière, la section inférieure (216b) comprenant une région de semelle (505) comportant une section d'orteils, une section de talon et une portion métatarsienne, la région de semelle (505) comportant une pluralité de portions sélectionnées de rigidité variable (330, 350, 430, 450, 530, 532, 534, 630, 640, 725, 820, 920),
    dans laquelle la pluralité de portions sélectionnées de rigidité variable sont configurées pour guider la prothèse de sorte qu'elle effectue une rotation dans une direction latérale vers médiale vers un bord intérieur de l'enveloppe lors de la déambulation.
  2. Enveloppe selon la revendication 1, dans laquelle la rigidité d'une portion parmi la pluralité de portions sélectionnées (330, 350, 430, 450, 530, 532, 534, 630, 640, 725, 820, 920) est inférieure à la rigidité d'une région entourant ladite portion sélectionnée.
  3. Enveloppe selon l'une quelconque des revendications 1 et 2, dans laquelle la rigidité d'une portion parmi la pluralité de portions sélectionnées (330, 350, 430, 450, 530, 532, 534, 630, 640, 725, 820, 920) est supérieure à la rigidité d'une région entourant ladite portion sélectionnée.
  4. Enveloppe selon l'une quelconque des revendications 1 à 3, dans laquelle les portions sélectionnées de rigidité variable sont réalisées sous la forme de garnitures (330, 350, 430, 450, 630, 640) disposées dans la section inférieure de l'enveloppe.
  5. Enveloppe selon l'une quelconque des revendications 1 à 4, dans laquelle les portions sélectionnées de rigidité variable sont réalisées sous la forme de garnitures (430, 450, 630, 640) disposées dans la surface extérieure (418b) de l'enveloppe.
  6. Enveloppe selon l'une quelconque des revendications 1 à 5, dans laquelle une portion parmi la pluralité de portions sélectionnées de rigidité variable (330, 430, 530, 630) est disposée dans la section de talon et une autre portion parmi la pluralité de portions sélectionnées de rigidité variable (350, 450, 532, 640) est disposée dans la portion métatarsienne.
  7. Enveloppe selon l'une quelconque des revendications 1 à 6, dans laquelle des portions sélectionnées de rigidité variable (920) sont disposées dans la section de talon (910) de telle sorte qu'un bord médial (912) et un bord latéral (914) de la section de talon (910) soient plus rigides que la partie médiane (916) de la section de talon.
  8. Enveloppe selon l'une quelconque des revendications 1 à 7, comprenant en outre un élément de support (820) s'étendant en travers de la portion métatarsienne (840), l'élément de support (820) présentant une rigidité supérieure à la rigidité de la partie environnante de la région de semelle.
  9. Enveloppe selon l'une quelconque des revendications 1 à 8, dans laquelle la pluralité de portions sélectionnées de rigidité variable comprennent en outre :
    une section de matériau d'absorption des chocs (330, 430) disposée sur la section de talon et présentant une première rigidité sélectionnée, la section de matériau d'absorption des chocs étant configurée pour assurer un niveau souhaité d'absorption des chocs ; et
    une section de matériau de retour d'énergie (350, 450) disposée sur la section métatarsienne et présentant une seconde rigidité sélectionnée, la section de matériau de retour d'énergie étant configurée pour assurer un niveau souhaité de retour d'énergie, les sections de matériau d'absorption des chocs et de retour d'énergie provoquant un mouvement de roulement du pied lors d'une transition de l'attaque du talon au décollement des orteils qui reproduit approximativement le roulement d'un pied humain naturel.
  10. Enveloppe selon l'une quelconque des revendications 1 à 9, dans laquelle l'extrémité supérieure (1420) s'étend à une certaine distance (H) au-dessus de la région de semelle, supérieure à une distance entre un talon et une cheville d'un pied humain naturel, une épaisseur (T) de la paroi (1430) au niveau de l'extrémité supérieure (1420) étant inférieure à une épaisseur de la paroi (1430) au niveau de la section inférieure (1410).
  11. Enveloppe selon la revendication 10, dans laquelle l'extrémité supérieure (1420) s'étend sur une distance de 7 cm à 10 cm autour de la région de semelle.
  12. Enveloppe selon l'une quelconque des revendications 10 et 11, dans laquelle l'épaisseur (T) de la paroi (1430) diminue de la section inférieure (1410) en direction de l'extrémité supérieure (1420).
EP05753573.4A 2004-05-28 2005-05-27 Enveloppe de pied fonctionnelle Not-in-force EP1755504B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US57514204P 2004-05-28 2004-05-28
US57558704P 2004-05-28 2004-05-28
PCT/US2005/018737 WO2005117746A2 (fr) 2004-05-28 2005-05-27 Enveloppe de pied fonctionnelle

Publications (2)

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EP1755504A2 EP1755504A2 (fr) 2007-02-28
EP1755504B1 true EP1755504B1 (fr) 2017-08-23

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US (2) US8128709B2 (fr)
EP (1) EP1755504B1 (fr)
CN (1) CN1980616B (fr)
WO (1) WO2005117746A2 (fr)

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Also Published As

Publication number Publication date
US20060015192A1 (en) 2006-01-19
CN1980616B (zh) 2011-07-20
WO2005117746A3 (fr) 2006-06-15
US20120165958A1 (en) 2012-06-28
EP1755504A2 (fr) 2007-02-28
WO2005117746A2 (fr) 2005-12-15
US8128709B2 (en) 2012-03-06
CN1980616A (zh) 2007-06-13

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